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Key Fixes on troubleshooting High Disk IO Problems

Posted by Allura on 30 09 2019.

What is High Disk IO?
The high desk IO feature determines the time required for the read and write disc speeds of your dedicated server On a particular hard disk. One of the most important things to note is that the speed of the server, which is then read and write speed directly affects the performance of your hard disk and the performance in cPanel and WHM. The load on the server is directly proportional to do the IO wait time. Longer IOB times will mean that there is enough load on the server which will directly hamper the performance of the read and write speeds on your hard disk.Some of the symptoms of high disk IO include:Slow hosted websites.
Slow WHM and cPanel interfaces.
Slow connection and delivery of the emails.
Very high server load resulting in a decrease of the server performance on the hard disk.
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What is High Disk IO?

The high desk IO feature determines the time required for the read and write disc speeds of your dedicated server On a particular hard disk. One of the most important things to note is that the speed of the server, which is then read and write speed directly affects the performance of your hard disk and the performance in cPanel and WHM. The load on the server is directly proportional to do the IO wait time. Longer IOB times will mean that there is enough load on the server which will directly hamper the performance of the read and write speeds on your hard disk.

Some of the symptoms of high disk IO include:

  1. Slow hosted websites.
  2. Slow WHM and cPanel interfaces.
  3. Slow connection and delivery of the emails.
  4. Very high server load resulting in a decrease of the server performance on the hard disk.
  5. chkservd notifications.

 

One important thing to note is that if the IO wait time is more than one divided by the total number of CPU cores, the CPU has to wait before it can process the data on the hard disk which consumes a lot of time.

Resolving High Disk IO Problem

Some of the solutions in order to resolve the high disk IO problem are listed below.

  1. Either upgrade your hard disk or split the server load into two or three different hard disks.
  2. Enable write caching on the
  3. The RAID array should also be checked for any hardware malfunction.

 

Can Direct Access Memory Help Improve IO Speeds?

Direct access memory or DMA is an integral part of the software which automatically detects anomalies And engages hardware acceleration. The DM and engages hardware acceleration. The DMA can you effectively improve read and write speeds on the hard disk and, does reducing the High Disk IO problem.

  1. To enable DMA for a hard drive, run the hdparm -d1 /dev/hda command.
  2. To disable DMA for a hard drive, run the hdparm -d0 /dev/hda command.
  3. To measure a hard drive’s transfer rate, run the hdparm -Tt /dev/hda command.
  4. To view a hard drive’s enabled options, run the hdparm /dev/hda command.
  5. To view more information about a hard drive, run the hdparm -i /dev/hda command.